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1N4743A-TR

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Vishay Intertech Zener Diodes, DO-204AL(DO-41). Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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1N4743A-TR

Vishay Intertech · Zener Diodes · DO-204AL(DO-41)

1N4743A-TR from Vishay Intertech, in a DO-204AL(DO-41). Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.

Pinout

Pin Name Type Function
1 K passive Cathode, marked by the cathode identification band on the DO-41 body; for the 1N4743A the Zener voltage is 13 V nominal at IZT 19 mA.
2 A passive Anode of the Zener diode; the 1N4743A has maximum forward voltage of 1.2 V at IF = 200 mA and Ptot of 1300 mW.

Key specifications

Parameter Value
Manufacturer Vishay Intertech
Package DO-204AL(DO-41)
Category Diodes
Pins 2

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Zener voltage tolerance -5 5 % Standard Zener voltage tolerance 1
Nominal Zener voltage VZ 13 V at IZT1 2
Test current IZT1 19 mA 2
Test current IZT2 0.25 mA 2
Reverse leakage current IR 5 μA at VR = 9.9 V 2
Dynamic resistance ZZT 10 Ω at IZT1, f = 1 kHz 2
Dynamic resistance ZZK 700 Ω at IZT2, f = 1 kHz 2
Surge current IR 344 mA tp = 10 ms 2
Regulator current IZM 69 mA 2
Power dissipation Ptot 1300 mW leads at a distance of 4 mm from case kept at ambient temperature 1
Junction temperature Tj 175 °C 1
Storage temperature range Tstg -65 175 °C 1
Forward voltage VF 1.2 V IF = 200 mA 1
Thermal resistance junction to ambient air RthJA 110 K/W leads at a distance of 4 mm from case kept at ambient temperature 1

CAD (KiCad official)

  • Symbol: 1N4743A-TR
  • Footprint: Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal
  • 3D model: DO-204AL(DO-41) (KiCad packages3D, STEP)

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: Vishay Intertech datasheet (4 pp, sha256 3c21a86a55b4b233, retrieved 2026-10-23, tier: manufacturer)
  • Extractor: parts-factory 2.0.0 / extract_pins 0.3, primary claude-sonnet-5-5 (text), consensus claude-sonnet-5-5 (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
  • CAD: KiCad official libraries (CC-BY-SA 4.0).

Datasheet PDF